Search

System effects can reduce fan capacity by as much as 45 percent Fan-rating tests are conducted in standardized configurations that are rarely reproduced exactly in the field. In most actual [...]

Rats, mice, birds and other vertebrate pests cause annual losses amounting to millions of tonnes stored foods in developing countries. Many of these pest losses are directly associated with poor [...]

Insurance industry computer system planners should employ enterprise-level architectural thinking. Systems planning should reflect executive thought. A suitable architecture can provide the flexibility needed for a system to be able to adapt to changes. A system's architecture should enable information to be used effectively throughout an organization. Such an architecture also can assure that all of a systems' parts work in concert., An insurance executive who is building for the 21st century must begin with a detailed architectural blueprint to make the company competitive and offer clients the finest service in the [...]

There are a number of issues an insurance executive must consider to ensure that the proper computer systems are installed. Most important is the design of the systems architecture, which must be able to perform a number of functions, including flexible information control and the ability to be adaptable as business situations change. Such enterprise-level architecture would be developed using easily understood terms and standards., An insurance executive who is building for the 21st century must begin with a detailed architectural blueprint to make the company competitive and offer clients the finest service in the [...]

I have wondered why someone didn't make a five-shot revolver chambered for the .45 ACP. My thought was that the Charter Arms Bulldog would be a good platform, and I [...]

The article presents a discussion of using an evasés in regaining fan-outlet static pressure, adapted from the article "Evasés: What They Are and How and Why to Use Them" by Paul Saxon. It mentions the application of evasé to convert high velocity and corresponding velocity pressure to increased static pressure. It notes that evasé reduces outlet-duct system losses through the use of larger ductwork.

No abstract.

Several letters to the editor are presented in response to the cover article "Secrets of the Male Shopper" in the September 4, 2006 issue.

The article offers information on the Certified Ratings Program (CRP) of Air Movement and Control Association (AMCA) International Inc. It states that custom products cannot be certified by AMCA whose certification process is accredited by the American Association for Laboratory Accreditation. It mentions that 21 air-movement and control products designed for installation in commercial, industrial and residential facilities are certified by AMCA.

Focuses on the versatility and overall effectiveness of muddler minnows. Experiences of the author in using minnows in fishing; Qualities of muddler winnows; Advantages of muddler winnows.

A reversed-phase solid-phase extraction—gas chromatography (SPE—GC)—electron capture detection method is developed to quantitate individual rethrin residues in pyrethrum-exposed brown tree snakes. Aliquots (6 g) of homogenized snake tissue are extracted with 10 mL acetonitrile. The rethrins are recovered from the acetonitrile extract and concentrated using C8 SPE. The rethrins are eluted from the SPE column with pentane, evaporated to near dryness, and reconstituted to 1 mL with 1-propanol. Individual rethrins are quantitated using GC analysis of the 1-propanol solution. Method limits of detection for rethrins range from 0.63 to 6.51 ng/g. The mean recovery for all rethrins is 70.8% with a standard deviation of 5.7%. This method is used to successfully quantitate incurred rethrin residues in pyrethrum-exposed brown tree snakes.

We evaluated the oral and dermal toxicity of 18 chemicals to brown tree snakes (Boiga irregularis). Chemicals that produced mortality when dosed orally were rotenone, propoxur, natural pyrethrins, allethrin, resmethrin, diphacinone, warfarin, and aspirin. The lowest oral doses that gave 100% mortality were: rotenone, 2.5 mg kg-1; pyrethrins, 40 mg kg-1; propoxur, 40 mg kg-1; diphacinone, 80 mg kg-1; and aspirin, 1280 mg kg-1. Allethrin, resmethrin, and warfarin produced 80% mortality at 40 mg kg-1, the highest dose tested. Materials given orally that produced little mortality were permethrin, fenvalerate, and carbaryl; those giving no mortality were phenothrin, tetramethrin, piperonyl butoxide, propylene glycol, and cholecalciferol. Chemicals that produced mortality when applied dermally at doses of 40 mg kg-1 were rotenone, nicotine, propoxur, natural pyrethrins, allethrin, and resmethrin; those that gave no mortality were permethrin, fenvalerate, phenothrin, tetramethrin, piperonyl butoxide, and diphacinone. Rotenone, at 10 mg kg-1, and nicotine, at 40 mg kg-1, were the most toxic dermally, killing all tested snakes. Piperonyl butoxide enhanced the oral toxicity of allethrin and resmethrin and the dermal activity of resmethrin; it did not enhance the activity of natural pyrethrins either orally or dermally.